8547
J . Am. Chem. SOC.1988, 110, 8547-8548
would then be available for adsorption of guest molecules. In addition, the internal surfaces of the intercalated imogolite tubes represent a second type of surface for guest molecule adsorption. The presence of regular microporosity for the montmorillonite complex was indicated by Langmuir-type adsorption isotherms for adsorbates with kinetic diameters (